My lovely baby

My baby is 3+ years old.  He is very smart and lovely.  In mid-August he started kindergarten. For the first two days, he cried not going to kindergarten and did not let me go when I left him with to his teachers, but I had to leave without looking back. He was very happy when I picked him up in the afternoon.  In the following days, he did not cry any more and told me he loved kindergarten. What a lovely baby. He adapted himself to the new environment so quickly.

In the US kindergarten is usually for children around 5 or 6 years old.  He must be very smart for his age!  Or maybe you mean to say "pre-school"?  But I'm sure he's very smart anyway ;-)